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MSC, SMS Ships of this type are both US government-owned and chartered vessels and are operated by civil service mariners or mariners employed by companies under contract to MSC. Military and civilian scientists and technicians carry out unique missions on various types of ships. SMSs provide highly specialized support services for their customers and often work in some of the most remote areas in the world. Some of SMSs' missions are: Oceanographic surveys Missile tracking Coastal surveys Cable laying and repair Submarine escort Deep submergence rescue support Other Navy operations 8/12/2016 11:16:44 AM